I tell our customers that there's a greater likelihood of something falling across the energized prongs with the ground down. Here in So CA, we have quakes that move appliances, pull plugs out, knock things off walls, etc.(but things still fall down, not up)
Through this whole thread, the best argument for the grounds down has been the asthetic or smiling face, which is not too strong.
Don't get me wrong, I put 'em in how the customer wants, but unless there's a reason not to,they go in grd up. The customers rely on us to guide them through the electrical safety issues, and our personal opinions count for something, whether it impresses a CMP or not.
